Construction & estimating · Site operations

Concrete maturity (strength in place) calculator

Temperature–time factor and equivalent age from logged temperatures, and estimated in-place strength from a calibration S = a + b·log10(M).

Standard: ASTM C1074 · Nurse-Saul TTF and Arrhenius equivalent age

Inputs in the worked example

The live calculator starts with these values; change any of them and every result, check and diagram updates instantly.

Concrete pour planner — Number of agitator trucks, trucks needed in rotation, pour duration, finish time and cost for a concrete pour.
Rebar cutting length and laps — Cutting length for straight, L, U or closed-link bars with bend deductions and hooks, the laps needed for…
Aggregate and base-course tonnage — Tonnes of road base, crushed rock or sand for an area and compacted thickness, with loose volume, truck…
Compaction production and lifts — Number of lifts, roller output and days to place and compact a fill platform.
Excavation dewatering estimate — Inflow to a dewatered excavation treated as an equivalent large-diameter well in an unconfined aquifer, with…
Trench shoring take-off — Panels, strut rows and struts for a strutted trench, with excavation volume and hire cost.
Truck and loader fleet balance — Truck cycle time, trucks needed to keep the loader busy, fleet production and hours to move a volume.
Plant fuel and CO₂ — Diesel use, cost and CO₂ for a plant fleet from rated power, load factor and specific fuel consumption.
Scaffold take-off (modular) — Component count for a single-run modular scaffold, with tie count and hire cost.
Concrete mix design (ACI 211.1) — Batch quantities per m³ (water, cement, coarse and fine aggregate) by the ACI absolute-volume method.

For preliminary design and education. Check every result against the current standard and your own engineering judgement before use.